Positive Crankcase Ventilation

Run engine at idle. Remove ventilation hose from PCV valve, hissing noise should be heard from hose and a strong vacuum should be felt immediately when finger is placed over valve inlet. If not, check hose and hose connections for leaks or obstructions. Check PCV valve. Service or replace as necessary.

Fig 1: Component Test Chart Symbol Identification

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 2: 240SX Air Injection Valve Check Chart

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Fig 3: 240SX Air Regulator Check Chart (1 of 2)

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Fig 4: 240SX Air Regulator Check Chart (2 of 2)

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Fig 5: 240SX Auxiliary Air Control (AAC) Check Chart

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Fig 6: 240SX FIDC Check Chart

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Fig 7: 240SX Fuel Pressure Regulator Solenoid Check Chart

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Fig 8: 240SX Fuel Pump Check Chart (1 of 2)

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Fig 9: 240SX Fuel Pump Check Chart (2 of 2)

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Fig 10: 240SX Injector Malfunction Check Chart

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Fig 11: 240SX Neutral/Inhibitor Switch Check Chart

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Fig 12: 240SX Start Signal Check Chart

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Fig 13: 240SX Swirl Control Valve Check Chart

Courtesy of NISSAN MOTOR CO., U.S.A.